Audiovox XR9 - XM Radio Tuner Manuel du propriétaire télécharger pdf (Page 13)

IRLinc Transmitter Owner’s Manual

Page 13 of 15

Incompatible Devices

Delphi XM Radios

Parity bits have been found to cause commands after the first to not work.

Sony VisionTouch

Check for either:

• “VisionTouch” printed on the faceplate

• Model number ending with “G”

• Came with “Air-Egg” remote

Almost no learning remote can work with a VisionTouch receiver. The VisionTouch system uses a 45 KHz carrier

frequency which uses a unique (non-standard) protocol that is unlearnable by almost every universal remote to date,

including the Philips Pronto and Sony’s own models. The problem extends in that you can’t use “normal” Sony

remotes or IR codes to control the receiver – even the Sony RM-AV3000 will not work. Affected models include:

STR-DA90ESG

STR-DE805G

STR-DE815G

STR-DE905G

STR-DE1015G

STR-D760Z

STR-G1ES

STR-G3

STR-GA9ESG

TA-VE800G

TA-VE810G

Sony’s newer receivers advertised with “2-way communications” are fully compatible with regular learning remotes.

Sony has since dropped the entire VisionTouch system from their lineup.

High Frequency IR Systems

Several brands of equipment feature IR systems that operate at frequencies much higher than normal. Though the

majority of IR remotes operate in the 30-40 KHz range, several brands such as a Bang & Olufsen, particular

Kenwood equipment, and some lighting control systems use a 455 KHz frequency. More unusual and difficult to work

are Pioneer and Pioneer Elite components built around 1997 that use a 1.125MHz carrier frequency.

Pace Cable Boxes

Pace designed a remote for their 1000 and 2000 series digital cable boxes using a protocol not actually intended for

remote control use. The IRDA variant was intended for high-speed data transfer over short distances (i.e., from laptop

to printer), rather than the slow-speed/long distance requirement of remote controls. The IRDA standard specifically

includes a format for remote controls. However, the Pace remotes do not use it. The issue is that trying to learn such

codes is much like asking an AM radio to receive FM signals – it simply isn’t possible. At this time, the only remote

controls that can offer even partial functionality are certain models from One For All. Even then you’ll most likely have

to send the remote to the factory in order for these codes to be added. More recent – and older – Pace models are

not affected by this problematic protocol.

Parity Bits

A somewhat common problem is when a device (such as a cable box) will accept a learned code once but not twice

in a row. For instance, you can enter the channel “1 – 2”, but not “3 – 3”. This is not a fault with your new remote, but

rather a very hard-to-work-with design employed by your equipment.

What happens is your original remote tacks on a “party bit” (sometimes called a “toggle bit”) to the end of each code.

So, the first time it sends the code it follows up with a “0”. The next time it ends with “1”. The problem is that a

learning remote can only learn or send the signal one way – the way you learned it. Your equipment, unfortunately,

will not accept the code again unless it ends with a new parity bit or you send a different code to clear the memory

buffer.

The most common example of equipment that uses this system is anything that employs the Philips RC5 or RC6

code format - such as Philips or Marantz products, or even Microsoft Media Center Edition remote controls. As the

RC5 and RC6 implementation guidelines make parity bit checking optional, not all RC5/RC6 devices will respond the

same way to non-alternating learned codes. Some may require parity bits at all times, some may only require it for

certain commands (such as “power”), some may use the parity bit only for closely repeated commands (meaning you

could send “3-3-3” quickly with the original remote but only slower using a learned code), while some ignore parity

bits completely and show no noticeable operational difference with or without.

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Audiovox XR9 - XM Radio Tuner Manuel du propriétaire Page 13

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